Error: Z probe readings not consistent

hello, I have another problem,
if I start mesh grid compensation then he goes with probe, only if he is halfway then I get this error
G29
Error: Z probe readings not consistent
I have this in the config M558 P8 X0 Y0 Z1 H3 B1 I1 F60 T7000 A2 R0.3
have tried different things, who is called a solution to this error